UINT WINAPI SHAppBarMessage(DWORD dwMessage, PAPPBARDATA pabd)
{
HWND hwndTray;
COPYDATASTRUCT cds;
TRAYAPPBARDATA tabd;
BOOL fret;
LPRECT lprc = NULL;
hwndTray = FindWindow(c_szTrayClass, NULL);
if (!hwndTray || (pabd->cbSize > SIZEOF(tabd.abd)))
{
return(FALSE);
}
tabd.abd = *pabd;
tabd.dwMessage = dwMessage;
tabd.hSharedRect = NULL;
tabd.dwProcId = GetCurrentProcessId();
cds.dwData = TCDM_APPBAR;
cds.cbData = SIZEOF(tabd);
cds.lpData = &tabd;
switch (dwMessage) {
case ABM_QUERYPOS:
case ABM_SETPOS:
case ABM_GETTASKBARPOS:
tabd.hSharedRect = SHAllocShared(NULL, SIZEOF(RECT), tabd.dwProcId);
if (tabd.hSharedRect == NULL)
return FALSE;
break;
}
fret = (SendMessage(hwndTray, WM_COPYDATA, (WPARAM)pabd->hWnd, (LPARAM)&cds));
if (tabd.hSharedRect) {
lprc = (LPRECT)SHLockShared(tabd.hSharedRect,tabd.dwProcId);
if (lprc == NULL)
{
fret = FALSE;
}
else
{
pabd->rc = *lprc;
SHUnlockShared(lprc);
}
SHFreeShared(tabd.hSharedRect,tabd.dwProcId);
}
return fret;
}
HANDLE MakeSharedPacket(IEThreadParamBlock * threadParams, LPCWSTR strPath, int dwProcessId)
{
HNFBlock* hnfData;
UINT sharedBlockSize = sizeof(*hnfData);
UINT directoryPidlLength = 0;
UINT pidlSize7C = 0;
UINT pidlSize80 = 0;
UINT pathLength = 0;
LPITEMIDLIST pidl80 = threadParams->offset80;
// Count the total length of the message packet
// directory PIDL
if (threadParams->directoryPIDL)
{
directoryPidlLength = ILGetSize(threadParams->directoryPIDL);
sharedBlockSize += directoryPidlLength;
DbgPrint("directoryPidlLength=%d\n", directoryPidlLength);
}
// another PIDL
if (threadParams->offset7C)
{
pidlSize7C = ILGetSize(threadParams->offset7C);
sharedBlockSize += pidlSize7C;
DbgPrint("pidlSize7C=%d\n", pidlSize7C);
}
// This flag indicates the presence of another pidl?
if (!(threadParams->offset84 & 0x8000))
{
if (pidl80)
{
pidlSize80 = ILGetSize(pidl80);
sharedBlockSize += pidlSize80;
DbgPrint("pidlSize80=%d\n", pidlSize7C);
}
}
else
{
DbgPrint("pidl80 sent by value = %p\n", pidl80);
pidlSize80 = 4;
sharedBlockSize += pidlSize80;
}
// The path string
if (strPath)
{
pathLength = 2 * lstrlenW(strPath) + 2;
sharedBlockSize += pathLength;
DbgPrint("pathLength=%d\n", pidlSize7C);
}
DbgPrint("sharedBlockSize=%d\n", sharedBlockSize);
// Allocate and fill the shared section
HANDLE hShared = SHAllocShared(0, sharedBlockSize, dwProcessId);
if (!hShared)
{
DbgPrint("Shared section alloc error.\n");
return 0;
}
PBYTE target = (PBYTE) SHLockShared(hShared, dwProcessId);
if (!target)
{
DbgPrint("Shared section lock error. %d\n", GetLastError());
SHFreeShared(hShared, dwProcessId);
return 0;
}
// Basic information
hnfData = (HNFBlock*) target;
hnfData->cbSize = sharedBlockSize;
hnfData->offset4 = (DWORD) (threadParams->dwFlags);
hnfData->offset8 = (DWORD) (threadParams->offset8);
hnfData->offsetC = (DWORD) (threadParams->offset74);
hnfData->offset10 = (DWORD) (threadParams->offsetD8);
hnfData->offset14 = (DWORD) (threadParams->offset84);
hnfData->offset18 = (DWORD) (threadParams->offset88);
hnfData->offset1C = (DWORD) (threadParams->offset8C);
hnfData->offset20 = (DWORD) (threadParams->offset90);
hnfData->offset24 = (DWORD) (threadParams->offset94);
hnfData->offset28 = (DWORD) (threadParams->offset98);
hnfData->offset2C = (DWORD) (threadParams->offset9C);
hnfData->offset30 = (DWORD) (threadParams->offsetA0);
hnfData->directoryPidlLength = 0;
hnfData->pidlSize7C = 0;
hnfData->pidlSize80 = 0;
hnfData->pathLength = 0;
target += sizeof(*hnfData);
// Copy the directory pidl contents
if (threadParams->directoryPIDL)
{
memcpy(target, threadParams->directoryPIDL, directoryPidlLength);
target += directoryPidlLength;
hnfData->directoryPidlLength = directoryPidlLength;
}
// Copy the other pidl contents
if (threadParams->offset7C)
{
memcpy(target, threadParams->offset7C, pidlSize7C);
target += pidlSize7C;
hnfData->pidlSize7C = pidlSize7C;
}
// copy the third pidl
if (threadParams->offset84 & 0x8000)
{
*(LPITEMIDLIST*) target = pidl80;
target += pidlSize80;
hnfData->pidlSize80 = pidlSize80;
}
else if (pidl80)
{
memcpy(target, pidl80, pidlSize80);
target += pidlSize80;
hnfData->pidlSize80 = pidlSize80;
}
// and finally the path string
if (strPath)
{
memcpy(target, strPath, pathLength);
hnfData->pathLength = pathLength;
}
SHUnlockShared(hnfData);
return hShared;
}
